package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserServlet;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserServlet {
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    public static final String WX_LOGIN = "http://api.weixin.qq.com/sns/jscode2session";

    @Override//微信登录方法
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务，获得当前用户的openid、
        /*Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);

        String openid = jsonObject.getString("openid");*/

        //判断openid是否为空，为空表示登录失败

      String openid= getOPenid(userLoginDTO.getCode());
        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断是否为新用户
        User user = userMapper.getByOpenid(openid);

        //新用户自动注册
        if (user==null){
             user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
             userMapper.insert(user);
        }
        //返回用户

        return user;
    }

    //调用微信接口服务，获得当前用户的openid
    private String getOPenid(String code){
        //调用微信接口服务，获得当前用户的openid、
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);

        String openid = jsonObject.getString("openid");
        return openid;
    }
    
}
